Dear Guido. I agree about splitting the patch. Therefore, I've created the following patchset which - Adds the unit of measure (i.e., milliseconds) in the documentation serial-rs485.txt (it is already available in the header file). - Sets RS485 delays using msleep (as in the cris driver) rather than using TTGR. - Adds an entry in sys/ to get/set the TTGR register for this specific driver. Have you tested the msleep part ? Best regards, Claudio -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html